SCM440 Forged Alloy Steel- SCALE STEEL.

​SCM440 is a kind of steel commonly used in the production of high strength fasteners. The product has the advantages of stable composition, low harmful elements, high purity of steel, small decarburization layer, [SCALE STEEL]few surface defects and so on. It is easy to make spidizing annealing, low cold heading cracking rate, stable heat treatment quality and uniform hardness, and is widely used in engine, mold and other industries.
Material Name: Alloy Structural Steel
Brand number: SCM440(Japanese brand, see standard JIS G4053-2008
 
Application:
It belongs to medium hardenability steel. After heat treatment, it has good strength, good comprehensive [SCALE STEEL]mechanical properties, good technability and high yield of finished products.The highest operating temperature is 427℃.Can be used as steam turbine fasteners.
Characteristics and application
1.Good quenching [SCALE STEEL]property, can be deep quenching, rather than the market anti-saw lock surface quenching
2.Less tendency to temper brittleness
3.Good high temperature processing, beautiful after processing
4.Good welding
5.The absorption performance of the impact is good, the hammer hit it will have a sense of rebound, unable to carry out violent destruction advantages:
(1) Good processability
(2). Good shock [SCALE STEEL]absorption performance
(3). Welding is easy
Chemical Composition
C: 0.38 to 0.43
Si: 0.15 to 0.35
Mn: 0.60 to 0.85
P: 0.03 or less
S: 0.03 or less
Cu: 0.30 or less
Ni: 0.25 or less
Cr: 0.90 to 1.20
Mo: 0.15 to 0.30
Ni: 0.25 or less
Cu: 0.30 or less
 
Mechanical Properties of SCM440:
Tensile strength [SCALE STEEL]σb (MPa) : ≥1080(110) Yield strength σs (MPa) : ≥930(95)
Elongation Δ5 (%) : ≥12
Section shrinkage ψ(%) : ≥45
Impact work AKV (J) : ≥63
Impact toughness value α kV (J/ Cm&SUP 2;)A: 78 (8) or
Hardness: 217 HB or less